Alarm-giving mechanism.



PATENTED JAN, 6, 1903.

E. H. JUHLIN ALARM GIVING MECHANISM.

APPLICATION FILED OUT. 27, 1902.

2 SHEETS-SHEET 1.

N0 MODEL.

Wneaams:

No. 717,866. PATENTED JAN. 6,1903.

7 B. H. JUHLIN.

ALARM GIVING MECHANISM.

APPLICATION FILED OUT. 27, 1902. I I

NO MODEL. 2 SHEETS-SHEET 2.

THE "cams PEYERS co, PHOTO-LITHQ. WASHINGTON, m c.

UNITED STATES PATENT ()FFICE.

ERIK H. JUHLIN, OFCHICAGO, lLLlNOlSl ALARM-GIVING MECHANISM.

SPEOLEICATION forming part of Letters Patent 0. 717,865, dated January6, 1903.

Application filed October. 27,1902. Serial'Noi 128,878. No model.)

;o w/wm it may concern:

Be it known that I, ERIK H. JUHLIN, a subject of the King of Sweden andNorway, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inAlarm-Giving Mechanism, of whichthe followingis a specification. 1

This invention relates to improvements in a mechanism to be used forringin'gdoor-bells or operating buzzers and the like; and it-consists incertain pecnliaritiesof the construction, novel arrangement, andoperation of the various parts thereof, as will be hereinafter morefully set forth and specifically claimed.

The principal object ot'my invention is to afford a mechanism forringing door-bells or operating other alarms which shall be simple andinexpensive in construction, strong, durable, and elfective inoperation. 1

Another object of the invention is to provide a mechanism of the abovedescribed character which shall be so constructed that it may be used togive an alarm at a considerable distance from the push-button, or themechanism and bell may bedirectly applied to the jamb or casing of thedoorway.

Still another object is to produce a pushbutton mechanism orwire-tightening device which shall have great leverage, thus insuringpositive action of the bell-ringing mechanism with a minimum of pressureon the push-button. I I

A further object of the invention is to so construct the mechanism thatit may be connected to a mechanical bell of the well-known or ordinarytype made in such a way as to ring in imitation otan electric bell.

Other objects and advantages of the invention will be disclosed in thesubjoined description and explanation,

In order to enable others skilled in the art to which myinventionpertains to make and use the same, I will now proceed to describe it,referring to the'accompanying drawings, in which Figure l is adiagrammatic perspective view of a portion of the walls of a building,showing my improved alarm-giving mechanism in place thereon andillustrating the bell as being located at some distance from. thepushbutton mechanism and showing the connectplan view of the bell andthe mechanism for operating the lever of the bell-ringing device.

Fig. -l is a side view, pa ly in section and partly in elevation,of thepush-button or wiretightening mechanism. Fig, 5 is a plan view thereof,showing a portion of the casing for the same broken away; and Fig. 6 isa detached perspective view of one of the levers used in the mechanismfor operating the lever of the bell-ringing device;

Similar letters refer to like parts throughout the different views ofthe drawings.

A represents a portion of a door-casing of a building, and A the wallsthereof. Secured to the outer surface of the jamb or casing A is abox-like casing B, which incloses the push-button or wire-tighteningmechanism. This casing is provided with a rounded portion-B, which hasan open extension 11 at about its center for the reception and operationof the push button or pin 0, which passes through an opening Z) in thecasing B and is connected'at its. inner end to the wiretightening lever,as will be presently explained. 4 I

Secured, by means of screws d, to the doorcasing A and usnallyin arecess a therein is a supporting-plate D, which is provided at its upperend with a transverse and raised or outwardly-projecting portion D,having at its middle a lip or lug d, provided with an opening (1 throughwhich the wire 01 passes. The upper surface of the transverse portion Dof the plate D is provided with two parallel arms 61 which extenddownwardly and are slightly curved, as is clearly shown in Fig. 4: ofthe drawings. The plate D is provided near the lower portion of thetransverse part D with an outwardly-extending rib or lug (1 againstwhich an arme on the wire-tightening lever rests. This wire-tighteninglever comprises a tongue-like portion E, having near its upper end aninwardly-extending transverse portion E, which is provided with openingse to receive the arms d onthe trans: verse portion of the plate D, as isclearlyshown in Fig. 5 of the drawings. The inner end of'the push buttonor pin Ois pivotally means of a link 0, which passes through a suitableopening in said lever. Connected at one of its ends to the lower end ofthe plate D is a spring 0', the other end of which is connected to thelower end of the lever E, as shown. By reference to Figs. 4 and 5 of thedrawings it will be seen that the upper portion of the lever-E projectssome distance from the transverse portion E and is rounded, as at e sothat the wire 61 which is secured at one of its ends to the lower end ofthe lever E, will rest on said rounded portion, as well as on the outersurface of the tongue-like portion of the lever, thus avoiding anydanger of the wire being cut or damaged by the lever and at the sametime affording the lat-' ver H, which is fulcrumed to the casing F bymeans of a shaft g, which also constitutes the shaft of the pinion g, asis shown in Figs. 3 and 6 of the drawings. The outer portion of theleverH is provided with a transverse slot h, in which is located a bolth, which connects the lever H with the lever H of the bellringing device(not shown) and which may be of the ordinary or any preferred kind.

Secured at one of its ends to the outer end of the rack-bar lever F is adouble-acting spring Lwhich is secured at about its middle by beingcoiled around a stem or pint' on the middle portion of the casingF,which casing is provided in its sides with openings through which thelevers F and H, as well as the other end of the spring I, extend. springI opposite the end which is secured to the lever F is connected, bymeans of a spring 1', to the lever H for the purpose of retracting saidlever after it has been thrown to the position indicated by dotted linesin Fig. 3 of the drawings. Secured at one of its ends to the lever F,between its fulcrum and the rackbarf, is a spring 7;,which is secured atits other end to a pin is on the casing F.

In Fig. l of the drawings I have shown the push-button orwire-tightening mechanism and the bell as being located at aconsiderable distance apart, and when such is the case the wire 01 whichconnects the wire-tightening mechanism and the mechanism for operatingthe lever of the bell-ringing device, should pass over suitable pulleysm, arranged at suitable points, so as to support the wire without unduefriction.

In Fig. 2 the same construction as above de- That end of the connectedto the lower end of the lever E by l scribed is employed, except thatall of the pulleys but one, m may be dispensed with.

From the foregoing and by reference to the drawings it will be seen andclearly understood thai. by pressing the push button or pin inwardly thewire-tightening lever E will be turned on its arm 6, which arm acts as afulcrum therefor and is preferably bifurcated and made integral with thesaid lever, as is clearly shown in Fig. 4 of the drawings. In thisoperation the wire (1 will be tightened, thus causing the rack-bar leverF and the lever H to assume the positions shown by dotted-lines in Fig.3 of the drawings. As soon as the pressure is removed from the pushbutton or pin the double-acting spring I and the springs i and is willcause said levers to be retracted or to assume their normal positions,as shown by continuous lines in said figure of the drawings. The spring0 of the push-button mechanism will force the lower end of the lever Eand the push-button outwardly as soon as the pressure is removed fromthe latter. as is apparent.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. In an alarm-giving mechanism, the combination with thesupportingplate having a raised transverse upper portion provided withdownwardly-projecting curved arms, of a spring-pressed wire-tighteninglever having a fulcrum-arm to rest on said plate and provided with atransverse upper portion having openings to receive the arms on saidplate, a spring-actuated rack-bar lever suitably fulcrumed, a pinionjournaled to mesh with the said rack-bar, a lever fixed to the pinion, aspring-actuated lever for the bell-ringing device loosely connected tothe lever on the pinion, and a connection uniting the wire-tighteninglever and rack-bar lever, substantially as described.

2. The combination with the supportingplate having curved armsprojecting downwardly from its upper portion, of a springactuated leverhaving a bifurcated fulcrumarm to rest against the plate and providedwith a transverse upper portion having openings to receive the arms onsaid plate, a push button or pin loosely connected to one end of saidlever, a rack-bar lever suitably fulcrumed and connected to thefirst-named lever, a pinion journaled to mesh with said rack-bar, alever fixed to the pinion, a lever for the bellringing device looselyconnected to the lever on the pinion, and a double-acting springconnected at one of its ends to the rack-bar lever and at its other endto the lever of the bellringing device, substantial1y as described.

ERIK H. JUHLIN.

Witnesses:

CHAS. O. TILLMAN, A. GUSTAFSON.

